PT1141449E - A method for dimming a surface layer of an object containing this layer of zinc - Google Patents

A method for dimming a surface layer of an object containing this layer of zinc

Info

Publication number
PT1141449E
PT1141449E PT99963569T PT99963569T PT1141449E PT 1141449 E PT1141449 E PT 1141449E PT 99963569 T PT99963569 T PT 99963569T PT 99963569 T PT99963569 T PT 99963569T PT 1141449 E PT1141449 E PT 1141449E
Authority
PT
Portugal
Prior art keywords
workpiece
layer
sub
anodic oxidation
ranging
Prior art date
Application number
PT99963569T
Other languages
Portuguese (pt)
Inventor
Thomas Kruse
Peter Meisterjahn
Original Assignee
Doerken Ewald Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Doerken Ewald Ag filed Critical Doerken Ewald Ag
Publication of PT1141449E publication Critical patent/PT1141449E/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Chemically Coating (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Lubricants (AREA)
  • Laminated Bodies (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention relates to a method for darkening a superficial layer of a workpiece which contains zinc by anodic oxidation. The workpiece is oxidized in a soaking bath containing an aqueous solution comprised of a hydroxide and of a nitrate. The anodic oxidation may be carried out in an aqueous solution containing NH.sub.4 NO.sub.3 or NaNO.sub.3, and having a pH value ranging from 8 to 14, at a dipping bath temperature (T) ranging from 15 to 45.degree. C., and with a current density (i) ranging from 3.times.10.sup.-4 to 0.5 A/cm.sup.2. The workpiece is placed in the soaking bath at the beginning of the anodic oxidation after the voltage has already been applied.
PT99963569T 1998-12-18 1999-12-17 A method for dimming a surface layer of an object containing this layer of zinc PT1141449E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19858795A DE19858795C2 (en) 1998-12-18 1998-12-18 Process for darkening a surface layer of a piece of material that contains zinc

Publications (1)

Publication Number Publication Date
PT1141449E true PT1141449E (en) 2003-09-30

Family

ID=7891788

Family Applications (1)

Application Number Title Priority Date Filing Date
PT99963569T PT1141449E (en) 1998-12-18 1999-12-17 A method for dimming a surface layer of an object containing this layer of zinc

Country Status (9)

Country Link
US (2) US6758956B1 (en)
EP (1) EP1141449B1 (en)
JP (1) JP2002533573A (en)
AT (1) ATE239109T1 (en)
DE (2) DE19858795C2 (en)
DK (1) DK1141449T3 (en)
ES (1) ES2197702T3 (en)
PT (1) PT1141449E (en)
WO (1) WO2000037717A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080169200A1 (en) * 2007-01-17 2008-07-17 Thomas David Burleigh Method of Anodizing Steel
US20200277707A1 (en) * 2017-09-15 2020-09-03 Oerlikon Surface Solutions Ag, Pfäffikon Method for producing coating with colored surface

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1953997A (en) * 1932-11-14 1934-04-10 New Jersey Zinc Co Anodic coating of zinc base metals
US3647650A (en) * 1969-07-16 1972-03-07 Nippon Kokan Kk Method of treating tin plate or galvanized sheet
US3642586A (en) * 1970-05-12 1972-02-15 Republic Steel Corp Anodic treatment for stainless steel
US3723102A (en) * 1970-06-15 1973-03-27 Airco Inc High strength iron-chromium-nickel alloy
JPS5993900A (en) * 1982-11-20 1984-05-30 Nippon Steel Corp Galvanized steel sheet having excellent weldability
IL69507A (en) * 1983-08-16 1986-11-30 Chromagen Metal Works Selective surfaces for collectors of solar and other radiation
JPS61113794A (en) * 1984-11-08 1986-05-31 Sumitomo Metal Ind Ltd Manufacture of blackening-treated steel plate
JPH0230795A (en) * 1988-04-28 1990-02-01 Kawasaki Steel Corp Production of black steel sheet
JPH03277798A (en) * 1990-03-28 1991-12-09 Kawasaki Steel Corp Production of blackening treated steel sheet
JPH04131396A (en) * 1990-09-21 1992-05-06 Kawasaki Steel Corp Production of black steel sheet
FR2758339B1 (en) * 1997-01-14 1999-06-04 Cirdep ANTICORROSION TREATMENT PROCESS FOR METAL PARTS AND PARTICULARLY FERROUS METAL PARTS

Also Published As

Publication number Publication date
WO2000037717A2 (en) 2000-06-29
ES2197702T3 (en) 2004-01-01
DE19858795A1 (en) 2000-06-21
US7311787B2 (en) 2007-12-25
ATE239109T1 (en) 2003-05-15
DK1141449T3 (en) 2003-08-25
DE59905366D1 (en) 2003-06-05
DE19858795C2 (en) 2001-03-15
US20050126921A1 (en) 2005-06-16
JP2002533573A (en) 2002-10-08
EP1141449B1 (en) 2003-05-02
EP1141449A2 (en) 2001-10-10
US6758956B1 (en) 2004-07-06
WO2000037717A3 (en) 2000-10-19

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